WO2008053808A1 - Dispositif d'alimentation électrique de véhicule - Google Patents

Dispositif d'alimentation électrique de véhicule Download PDF

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Publication number
WO2008053808A1
WO2008053808A1 PCT/JP2007/070928 JP2007070928W WO2008053808A1 WO 2008053808 A1 WO2008053808 A1 WO 2008053808A1 JP 2007070928 W JP2007070928 W JP 2007070928W WO 2008053808 A1 WO2008053808 A1 WO 2008053808A1
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WO
WIPO (PCT)
Prior art keywords
voltage
switch
power
power storage
vehicle
Prior art date
Application number
PCT/JP2007/070928
Other languages
English (en)
Japanese (ja)
Inventor
Kazuki Morita
Yohsuke Mitani
Takafumi Koike
Hideaki Hamai
Original Assignee
Panasonic Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2006298635A external-priority patent/JP5130694B2/ja
Priority claimed from JP2006315224A external-priority patent/JP5011978B2/ja
Priority claimed from JP2006338113A external-priority patent/JP5018063B2/ja
Application filed by Panasonic Corporation filed Critical Panasonic Corporation
Priority to EP07830662.8A priority Critical patent/EP2080673B1/fr
Publication of WO2008053808A1 publication Critical patent/WO2008053808A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/002—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which a reserve is maintained in an energy source by disconnecting non-critical loads, e.g. maintaining a reserve of charge in a vehicle battery for starting an engine

Definitions

  • the present invention relates to a power storage device for a vehicle having an auxiliary power supply function for supplying power from a power storage unit when the voltage of a main power supply of the vehicle drops, for example, and a power supply device for a vehicle including the power storage device.
  • vehicles having an idling stop function have been developed from the viewpoint of environmental protection in order to reduce exhaust gas and suppress fuel consumption during idling of automobiles (hereinafter referred to as vehicles).
  • the force S that operates the starter which causes a large current to flow through the starter, temporarily lowering the battery voltage.
  • power to loads such as audio and car navigation was interrupted, causing problems such as music being interrupted and destination settings for car navigation being erased and re-setting required.
  • Patent Document 1 proposes a vehicle power supply device as an auxiliary power supply for supplying sufficient power to a load when a voltage of a battery temporarily drops.
  • FIG. 20 is a block diagram showing the configuration of the vehicle power supply device according to the first prior art having this configuration.
  • the power supply circuit 301 is provided with an auxiliary power supply unit 303 composed of an electric double layer capacitor in order to store auxiliary power.
  • the auxiliary power supply unit 303 is connected to a charging circuit 305 and a stabilization circuit 307 that outputs electric power from the auxiliary power supply unit 303.
  • a detection circuit 309 for detecting the voltage is connected to the input side of the charging circuit 305.
  • a power supply switching unit 311 for switching whether to supply power from the auxiliary power supply unit 303 according to the detection voltage of the detection circuit 309 is connected!
  • a main power supply unit 315 made of a battery is connected to the input side of such a power supply circuit 301, that is, to the input of the charging circuit 305 through a switch 313.
  • One end of a switch 317 is connected between the switch 313 and the power supply circuit 301, and the other end is connected to the engine 31. 9 is connected to the built-in starter.
  • the switch 313 and the switch 317 are on / off controlled by the key mounting portion 321.
  • the key mounting unit 321 has four modes: a lock mode, an accessory mode, an on mode, and a start mode. In the lock mode, both switch 313 and switch 317 are off. In accessory mode and on mode, switch 313 is turned on and switch 317 is turned off. In start mode, both switch 313 and switch 317 are on.
  • an in-vehicle device 323 such as an audio or car navigation system is connected to the output side of the power supply circuit 301, that is, the output of the power switching unit 311.
  • the operation of the vehicle power supply device of FIG. 20 will be described below.
  • the switch 313 is turned on.
  • the power of the main power supply unit 315 is supplied to the charging circuit 305, the detection circuit 309, and the power supply switching unit 311.
  • the charging circuit 305 charges the auxiliary power supply unit 303 and the power supply switching unit 311 selects the main power supply unit 315 side as shown in FIG. Power is supplied and audio, car navigation, etc. operate.
  • the switch 317 is also turned on.
  • the power of the main power supply unit 315 is supplied to the starter built in the engine 319, so that the engine starts.
  • the detection circuit 309 detects this change and detects that the change is lower than a predetermined reference value
  • the power supply switching unit 311 is switched to the auxiliary power supply unit 303 side.
  • power is supplied from the auxiliary power supply unit 303 to the in-vehicle device 323, so that the in-vehicle device 323 can continue to operate.
  • the switch 317 is turned off by setting the key to the on mode.
  • the voltage of the main power supply unit 315 becomes higher than a predetermined reference value, so this change is detected by the detection circuit 309 and the power supply switching unit 311 is switched to the main power supply unit 315 side.
  • power is supplied to the in-vehicle device 323 from the main power supply unit 315.
  • the idling stop state In the idling stop state, although the engine 319 is stopped, the voltage of the main power supply unit 315 is a predetermined reference. Since it is higher than the threshold value, the power supply switching unit 311 continues to select the main power supply unit 315 side. As a result, the power from the main power supply unit 315 is supplied to the in-vehicle device 323. In this state, when the idling stop state is completed and the engine 319 is restarted, the starter built in the engine 319 operates, so that the voltage of the main power supply unit 315 becomes lower than a predetermined reference value.
  • the power supply switching unit 311 selects the auxiliary power supply unit 303 side, and the power of the auxiliary power supply unit 303 is supplied to the in-vehicle device 323.
  • the in-vehicle device 323 can continue to operate even during the starter operation after the idling stop. With the above operation, the in-vehicle device 323 is continuously supplied with stable power even during starter operation, and it is possible to avoid interruption of music or deletion of settings.
  • Patent Document Proposed in 2 a power storage device as an auxiliary power source for supplying sufficient electric power to a load when the voltage of the battery is temporarily reduced or supplying electric power to the vehicle braking system when the battery is abnormal is disclosed in, for example, Patent Document Proposed in 2.
  • Patent Document 2 is shown as a power supply backup unit that supplies electric power to an electronic control circuit of a vehicle braking system among battery devices, particularly when the battery is abnormal.
  • FIG. 21 is a block diagram showing a configuration of a vehicle power supply device according to the second prior art having this configuration.
  • a large-capacity electric double layer capacitor is used as a power storage element that stores electric power
  • a capacitor unit 401 as a power storage unit is configured by connecting a plurality of these.
  • the capacitor unit 401 is connected to a charging circuit 403 and a discharging circuit 405 that control charging and discharging.
  • the charging circuit 403 and the discharging circuit 405 are controlled by a microcomputer 407.
  • the microcomputer 407 is connected to a voltage detection circuit 409 for detecting a battery abnormality.
  • An FET switch 411 that supplies the electric power of the capacitor unit 401 at all times is connected.
  • the power storage device 413 as a power backup unit configured as described above is connected between the battery 415 and the electronic control circuit 417, and is controlled to be started and stopped by the innovation switch 419.
  • the electronic control circuit 417 Since the electronic control circuit 417 is a vehicle braking system, the electronic control circuit 417 must be continuously driven even when the battery 415 becomes abnormal in order to ensure safety. Therefore, when the voltage detection circuit 409 detects an abnormality of the battery 415, the FET switch 411 is turned on to supply the electric power of the capacitor unit 401 to the electronic control circuit 417, thereby responding to the abnormality of the battery 415.
  • Patent Document 2 proposes a vehicle power supply device that can compensate for a voltage even during a sudden load change by mounting a storage element such as a large-capacity capacitor as an auxiliary power source in addition to a battery. ing.
  • a storage element such as a large-capacity capacitor
  • the microcomputer 407 controls the charging circuit 403 to supply the electric power of the battery 415 to the capacitor unit 401, and performs a charging operation until a constant voltage is reached.
  • the microcomputer 407 monitors the voltage Vb of the battery 415 by the voltage detection circuit 109, and this voltage Vb is determined in advance.
  • the FET switch 411 is turned on when the voltage is equal to or lower than the set reference voltage (voltage with the circuit variation plus the margin of the operation lower limit voltage of the load, etc.).
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2002-064946.
  • Patent Document 2 Japanese Patent Laid-Open No. 2005-028908.
  • the in-vehicle device 323 operates even when the vehicle is first activated from the time when the vehicle is not in use (initially activated) by setting the key of the key mounting portion 321 to the start mode.
  • the auxiliary power source 303 may not be sufficiently charged and the operation of the in-vehicle device 323 may not be continued.
  • the in-vehicle device 323 operates or does not operate depending on the state of charge of the auxiliary power supply unit 303, the power supply system, the in-vehicle device 323, etc. break down! There was a problem that there was a possibility of being misrecognized.
  • the detection circuit 309 is turned off by turning off the switch 313. Recognizing the voltage drop of 315, an operation of continuously supplying power from the auxiliary power supply unit 303 to the in-vehicle device 323 is assumed. However, if this operation is performed, the in-vehicle device 323 will continue to operate despite the key being set to the lock mode for the driver. Division that may be recognized There was a title.
  • the electronic control circuit 417 can be continuously driven when the battery 415 is abnormal, the safety of the vehicle braking system is improved. Power that can be secured When such a power storage device is applied to an application that supplies power to a load when the voltage of the battery 415 temporarily drops due to driving of a starter as described above, for example, a problem such as 7 fires was there. That is, when the power storage device is used as an auxiliary power source for the vehicle braking system as in the conventional case, the power stored in the capacitor unit 401 may be supplied to the vehicle braking system until the vehicle stops when the battery 415 is abnormal. Therefore, the capacitor unit 401 was charged / discharged only once every time the vehicle was used.
  • the power supply source to the microcomputer 407 is only the battery 415 via the innovation switch 419. Therefore, when the voltage of the battery 415 drops, the power to the microcomputer 407 is reduced. There was a possibility that power could not be supplied.
  • FIG. 23 is a block diagram illustrating a configuration of a vehicle power supply device including a power storage device 413A according to the related art 3, and FIG. 23 is a diagram illustrating an operation of the vehicle power supply device of FIG. 22 in which each voltage Vb, Vc, It is a timing chart which shows the change of Vref and Vmin.
  • a configuration may be adopted in which wiring for supplying electric power from the capacitor unit 401 to the microcomputer 407 is added and two diodes 421 are provided to prevent backflow.
  • the higher voltage of the battery 415 or the capacitor unit 401 becomes the power supply source of the microcomputer 407. Therefore, even when the voltage of the battery 415 drops, the microcomputer 407 continues to operate with the power of the capacitor unit 401. That's the power S.
  • capacitor unit 401 is not from battery 415.
  • the microcomputer 40 7 operates with the electric power from As a result, although the microcomputer 407 can be operated by the battery 415, the electric power energy stored in the capacitor unit 401 is unnecessarily taken out, and wasteful power consumption is performed.
  • Reference numeral 501 denotes power supplied from the capacitor unit 401 to the accessory load and the microcomputer 407.
  • Reference numerals 502 and 503 denote power supplied from the capacitor unit 401 only to the microcomputer 407.
  • the idling stop starts at time tO.
  • the alternator also stops, so that the voltage Vb of the battery 415 gradually decreases to the voltage of the battery 415 depending on the state of the peripheral load (not shown). Therefore, when time 1 is reached, the voltage Vb of the battery 415 falls below the voltage Vc of the capacitor unit 401.
  • the higher voltage of the battery 415 or the capacitor unit 401 becomes the power supply source of the microcomputer 407.
  • the power of 1 is supplied to the microcomputer 407. Along with this, the voltage Vc of the capacitor unit 401 gradually decreases.
  • the voltage Vb at 415 starts to drop sharply. During this time, since the vertical relationship of the voltages Vb and Vc does not change, the power to the capacitor unit 401 continues to be supplied to the microcomputer 407. Further, when the voltage Vb of the battery 415 drops and becomes equal to or lower than the reference voltage at time t3, the microcomputer 407 turns on the FET switch 411. As a result, power is also supplied to the electronic control circuit 417.
  • a first object of the present invention is for a highly reliable vehicle that solves the above-described problems and can reduce the possibility of erroneous recognition of a failure when the vehicle is initially started or when the vehicle is not in use. It is to provide a power supply device.
  • a second object of the present invention is to solve the above-described problems and provide a highly reliable vehicle power storage device that can detect a failure of a switch or a diode.
  • a third object of the present invention is to provide a vehicular power storage device that can solve the above problems and reduce unnecessary power consumption. Means for solving the problem
  • a vehicle power supply device according to a first invention
  • a power storage unit for storing the power of the main power source
  • a load connected to the main power source and the power storage unit
  • the vehicle power source device includes control means for controlling power supply from the power storage unit to the load.
  • the control means is at least
  • control means further controls to prohibit power supply from the power storage unit to the load when the vehicle is first activated from a non-use state of the vehicle. It is characterized by doing.
  • the vehicle power supply apparatus further includes a vehicle power switch for switching a power supply destination from the main power source,
  • the accessory mode switch is configured so that the vehicle power switch is switched from the lock mode to the lock mode.
  • the control means is supplied from the main power source via the switch in the accessory mode.
  • the accessory load voltage (Vac) is detected and the accessory load voltage (Vac) is equal to or higher than the main power supply voltage (Vb)
  • the vehicle is not used and the vehicle is started first. It is characterized by detecting this.
  • control means outputs a predetermined abnormality signal when the voltage (Vac) of the accessory load is in an off state for a predetermined time or more.
  • control means is configured such that when the vehicle power switch is switched from the on mode to the accessory mode, or when the on mode is switched to the lock mode. Control is performed to prohibit power supply from the power storage unit to the load.
  • control means outputs a disconnection signal if the supply voltage to the load is in an off state for a predetermined time or more.
  • a power storage device according to a second invention provides:
  • a power storage unit connected between the main power source and the load for storing electric power
  • a charging circuit that is connected between the main power source and the power storage unit and that controls charging from the main power source to the power storage unit while detecting a voltage (Vc) of the power storage unit; and between the main power source and the load And a first voltage detection circuit for detecting the voltage (Vb) of the main power supply,
  • a switch that is connected between the power storage unit and the load and that switches whether to output the power of the power storage unit to the load;
  • a second voltage detection circuit connected to a second connection point between the switch and the diode and detecting a voltage (Vs) at the second connection point;
  • a power storage device comprising: the charging circuit; the first voltage detection circuit; the switch; and the control means connected to the second voltage detection circuit for controlling the switch.
  • the switch failure based on the voltage (Vc) of the power storage unit detected by the charging circuit and the voltage (Vs) of the second connection point detected by the second voltage detection circuit.
  • the control means detects that the diode is in an abnormal heat generation state when the voltage (Vs) at the second connection point is equal to or higher than the operating limit value of the diode when the switch is off. It is characterized by.
  • the predetermined condition is a case where the predetermined condition is only once during a period from a non-use state to a first use state until the power storage unit is fully charged. To do.
  • control means detects the abnormal heat generation state of the diode
  • the control means stops charging / discharging of the power storage unit, and the voltage at the second connection point ( Control is performed so that charging and discharging of the power storage unit is resumed when Vs) becomes equal to or less than the operable value of the diode.
  • the operable value of the diode is set to a value smaller than the operation limit value.
  • the power storage device further includes a cooling means for cooling the diode, and the control means operates the cooling means when detecting an abnormal heat generation state of the diode, and the second connection. Control is performed so that the operation of the cooling means is stopped when the voltage (Vs) at the point falls below the operable value of the diode.
  • the operable value of the diode is set to a value smaller than the operation limit value
  • the control means is configured such that the voltage at the second connection point ( When Vs) is equal to or higher than the operable value, it is determined that the switch has a short circuit failure! /.
  • the cooling means is a fan.
  • a power storage device according to a third invention provides:
  • a power storage unit connected between the main power source and the load for storing electric power
  • a charging circuit that is connected between the main power source and the power storage unit and controls charging from the main power source to the power storage unit while detecting a voltage (Vc) of the power storage unit;
  • a first voltage detection circuit connected between the main power supply and the load and detecting a voltage (Vb) of the main power supply;
  • a switch that is connected between the power storage unit and the load and that switches whether to output the power of the power storage unit to the load;
  • a force sword connected to a first connection point between the first voltage detection circuit and the load
  • a diode having an anode connected to the switch
  • a second voltage detection circuit connected to the first connection point and detecting a voltage (Vd) at the first connection point;
  • a power storage device that is connected to the charging circuit, the first voltage detection circuit, the switch, and the second voltage detection circuit, and includes a control unit that controls the switch, the control unit When the switch is turned on and discharging from the power storage unit to the load via the switch, the voltage (Vc) of the power storage unit detected by the charging circuit and the second voltage detection circuit.
  • the failure detection of at least one of the switch and the diode is performed based on the voltage (Vd) of the first connection point detected by the above.
  • the power storage device further includes a third voltage detection circuit connected to a second connection point between the switch and the diode, and detecting a voltage (Vs) at the second connection point.
  • the control means turns on the switch and discharges the load from the power storage unit to the load via the switch, the voltage (Vc) of the power storage unit detected by the charging circuit, and the second Based on the voltage (Vd) at the first connection point detected by the voltage detection circuit and the voltage (Vs) at the second connection point detected by the third voltage detection circuit, the switch and It is characterized by detecting a failure of each of the diodes.
  • a power storage device according to a fourth invention provides:
  • a power storage unit connected between a main power source and a load and storing the power of the main power source; a switch connected between the power storage unit and the load; A voltage detection circuit connected to the main power supply for detecting the voltage (Vb) of the main power supply, and a control for controlling the switch based on the voltage (Vb) of the main power supply detected by the voltage detection circuit.
  • a first diode connected between the main power supply and a power supply terminal of the control means, and supplying power from the main power supply to the control means;
  • a power storage device comprising: a power supply terminal of the control means; and a second diode connected between the load and supplying power from the power storage unit to the control means when the switch is turned on.
  • the control means turns on the switch to generate power from the power storage unit.
  • the switch is turned off to turn off the electric power from the power storage unit. Control is performed to stop the supply to the load.
  • the reference voltage (Vref) includes a first reference voltage (Vref 1) and a second reference voltage (Vref 2) lower than the first reference voltage,
  • the control means turns on the switch when the voltage (Vb) of the main power source detected by the voltage detection circuit is less than a predetermined reference voltage (Vref 2), thereby supplying power from the power storage unit. Is supplied to the load, and when the voltage (Vb) of the main power source detected by the voltage detection circuit becomes equal to or higher than the reference voltage (Vref 1), the switch is turned off to turn off the power storage unit. Control is performed to stop the supply of electric power to the load.
  • the vehicle power supply device of the first invention when the vehicle is not in use and when power is supplied from the main power source to the starter for starting the engine of the vehicle, When power is not supplied from the main power source to the load, or when the vehicle is not used and when the vehicle is first activated from the time when the vehicle is not used, power is supplied from the power storage unit to the load. So, when you set the key to start mode or Power supply to the on-vehicle device 323 or the accessory load 15 is stopped.
  • the in-vehicle device 323 or accessory load 15 performs the same start and end operations as a general vehicle, so there is a possibility of erroneous recognition of the driver's failure when using the vehicle. Can be reduced. Therefore, a highly reliable vehicle power supply device can be realized.
  • the first voltage detection circuit that detects the voltage Vs between the switch and the diode is provided to turn on the switch under a predetermined condition. It is possible to detect the voltages Vc and Vs at both ends of the switch when the switch is turned off, and to detect a failure of the switch based on this. Further, the voltage at the second connection point 119 due to the leakage current of the diode is detected by the second voltage detection circuit, and based on this, a failure due to abnormal heat generation of the diode can be detected. Therefore, a highly reliable power storage device can be realized.
  • the power storage device of the third invention while the power storage unit is discharged, the voltage Vc of the power storage unit and the voltage Vd of the second connection point 119 are detected, By determining whether or not the voltage difference is within the normal allowable range, it is possible to detect a failure of at least one of the switch and the diode. Therefore, a highly reliable power storage device can be realized.
  • the power storage device of the fourth invention when the voltage (Vb) of the main power source detected by the voltage detection circuit becomes less than a predetermined reference voltage (Vref), When the switch is turned on, power from the power storage unit is supplied to the load, and the voltage (Vb) of the main power source detected by the voltage detection circuit becomes equal to or higher than the reference voltage (Vref). In addition, control is performed to stop the supply of power from the power storage unit to the load by turning off the switch. This can reduce unnecessary power consumption from the power storage unit.
  • Vref a predetermined reference voltage
  • FIG. 1 is a block diagram showing a configuration of a vehicle power supply device including a power storage device 13 according to a first embodiment of the present invention.
  • FIG. 2 is a circuit diagram showing a detailed configuration of the vehicle power switch 19 of FIG.
  • FIG. 3 is a flowchart showing a first control process executed by the vehicle control circuit 27 of FIG. 1.
  • FIG. 4 is a flowchart showing a first control process executed by the control circuit 43 of the power storage device 13 of FIG.
  • FIG. 5 is a flowchart showing a second control process executed by the vehicle control circuit 27 of FIG. 1.
  • FIG. 6 is a flowchart showing a third control circuit executed by the vehicle control circuit 27 of FIG.
  • FIG. 7 is a flowchart showing a fourth control circuit executed by the vehicle control circuit 27 of FIG.
  • FIG. 8 is a flowchart showing a second control process executed by the control circuit 43 of the power storage device 13 of FIG.
  • FIG. 9 is a diagram showing the operation of the vehicle power supply device of FIG. 1 and the vehicle power supply device according to a modification thereof, and is a timing chart showing changes in the switches 19a, 19b, 19c and the switch 35.
  • FIG. 9 is a diagram showing the operation of the vehicle power supply device of FIG. 1 and the vehicle power supply device according to a modification thereof, and is a timing chart showing changes in the switches 19a, 19b, 19c and the switch 35.
  • FIG. 10 is a block diagram showing a configuration of a vehicle power supply device including a power storage device 13A according to a second embodiment of the present invention.
  • FIG. 11 is a flowchart showing a failure detection process executed by the control circuit 43A of FIG.
  • FIG. 12 is a block diagram illustrating a configuration of a vehicle power supply device including a power storage device 13B according to a third embodiment of the present invention.
  • FIG. 13 is a block diagram showing a configuration of a vehicle power supply device including a power storage device 13C according to a fourth embodiment of the present invention.
  • FIG. 14 is a flowchart showing a failure detection process executed by the control circuit 43C of FIG.
  • FIG. 15 is a block diagram showing a configuration of a vehicle power supply device including a power storage device 13D according to a fifth embodiment of the present invention.
  • FIG. 16 is a flowchart showing failure detection processing executed by the control circuit 43D of FIG. It is.
  • FIG. 17 is a block diagram showing a configuration of a vehicle power supply device including a power storage device 13E according to a sixth embodiment of the present invention.
  • FIG. 18 is a diagram showing the operation of the vehicle power supply device of FIG. 17, and is a timing chart showing changes in voltages Vb, Vc, Vref and Vmin.
  • FIG. 19 is a diagram showing the operation of a modified example of the vehicle power supply device of FIG. 17, and is a timing chart showing changes in voltages Vb, Vc, Vrefl, Vref 2 and Vmin.
  • FIG. 20 is a block diagram showing a configuration of a vehicle power supply device according to a first conventional technique.
  • FIG. 21 is a block diagram showing a configuration of a vehicle power supply device according to a second conventional technique.
  • FIG. 22 is a block diagram showing a configuration of a vehicle power supply device according to a third conventional technique.
  • FIG. 23 is a diagram showing the operation of the vehicle power supply device of FIG. 22, and is a timing chart showing changes in voltages Vb, Vc, Vref and Vmin.
  • FIG. 1 is a block diagram showing a configuration of a vehicle power supply device including a power storage device 13 according to the first embodiment of the present invention
  • FIG. 2 is a circuit diagram showing a detailed configuration of the vehicle power supply switch 19 of FIG. It is.
  • FIG. 3 is a flowchart showing a first control process executed by the vehicle control circuit 27 of FIG. 1
  • FIG. 4 is a flowchart showing a first control process executed by the control circuit 43 of the power storage device 13 of FIG. It is.
  • FIG. 5 is a flowchart showing a second control process executed by the vehicle control circuit 27 of FIG. 1
  • FIG. 6 shows a third control circuit executed by the vehicle control circuit 27 of FIG. FIG.
  • FIG. 7 is a flowchart showing a fourth control circuit executed by the vehicle control circuit 27 of FIG.
  • FIG. 8 is a flowchart showing a second control process executed by the control circuit 43 of the power storage device 13 in FIG. 1
  • FIG. 9 is a diagram for the vehicle power source device in FIG.
  • FIG. 6 is a timing chart showing the changes of the switches 19a, 19b, 19c and the switch 35, showing the operation of the power supply device.
  • FIG. 3 and FIG. 4 show the operation of the vehicle power supply device when the vehicle is not in use and when the vehicle is first activated.
  • Fig. 5 shows the operation of detecting an abnormality in the accessory power supply system of the vehicle power supply device.
  • Figure 6 shows the operation for detecting disconnection to the load of the vehicle power supply.
  • FIGS. 7 and 8 show the operation of the vehicle control circuit and the storage device control circuit when the vehicle power supply device changes from the vehicle use state to the vehicle non-use state.
  • a power storage device 13 for storing the power of the main power supply 11 is connected to the main power supply 11 made of a battery.
  • the output of the power storage device 13 includes audio, navigation, audio-visual navigation, and the like.
  • Load including accessories hereinafter referred to as accessory load 15).
  • the main power supply 11 is connected to a generator 17 that generates electric power by driving an engine (not shown), and thereby the main power supply 11 is charged.
  • the main power supply 11 is connected to a vehicle power switch 19 that selects a power supply destination by a key operation of the vehicle key switch 195 in FIG. Thereby, the power of the main power supply 11 is supplied to the load in the vehicle.
  • the vehicle power switch 19 has four operation modes, a lock mode, an accessory mode, an on mode, and a start mode, as in the prior art. Accordingly, the vehicle power switch 19 selects any one of the accessory output terminal 191, the on-mode output terminal 192, and the start output terminal 193, and outputs power corresponding to these modes.
  • the vehicle power switch 19 in FIG. 2 has three switches 19a, 19b, and 19c that are turned on / off based on a key operation of the vehicle key switch 195.
  • an input terminal 190 connected to the main power supply 11 and the generator 17 is connected to the accessory load 15 via the switch 19a and the output terminal 191 and further via the diode 37. Further, the input terminal 190 is connected to the main load 21 via the switch 19b. Further, the input terminal 190 is connected to the starter 23 through the switch 19c.
  • the vehicle power switch 19 in FIG. 2 has the following four operation modes.
  • Lock mode is a mode in which all the outputs of the vehicle power switch 19 are turned off, and all the three switches 19a, 19b, 19c are turned off. As a result, power supply to the power storage device 13 and all loads is cut off.
  • the accessory mode is a mode in which power is supplied only to the accessory output terminal 191 among the output terminals of the vehicle power switch 19, and only the switch 19a in the accessory mode is turned on. Therefore, the accessory load 15 is connected to the accessory output terminal 191 via the power storage device 13 as described above.
  • On mode The on mode is a mode in which power is supplied to the accessory output terminal 191 and the on-mode output terminal 192 among the output terminals of the vehicle power switch 19, and the switches 19a, 19b are turned on and the switch 19c is turned on. Turned off. Therefore, by setting the on mode, power is supplied to all loads connected to the accessory load 15 and the on mode output terminal 192 (hereinafter referred to as the main load 21) and the power storage device 13.
  • Start mode The start mode is a mode in which power is supplied to the on-mode output terminal 192 and the start output terminal 193 among the output terminals of the vehicle power switch 19, and the switches 19b and 19c are turned on and the switch 19a. Is turned off. Therefore, in the start mode, electric power is supplied to the main load 21, the power storage device 13, and the starter 23 that starts the engine. At this time, since the switch 19a of the accessory output terminal 191 is turned off, the power supply to the accessory load 15 is stopped.
  • the switch 19a of the accessory output terminal 191 is configured to be turned off (see time tl 3 in FIG. 9).
  • the starter 23 is a starter switch.
  • This starter switch 25 is used when the idling stop state is finished and the engine is restarted, and its on / off control is performed by the vehicle control circuit 27.
  • the vehicle control circuit 27 performs various vehicle controls, including microcomputer power. Here, only functions necessary for this embodiment will be described below. That is, in addition to outputting the starter signal STon indicating on / off of the starter switch 25 described above, the voltage of the accessory power supply system output from the accessory output terminal 191 (hereinafter referred to as the accessory voltage Vac) is detected. Accessory voltage detection circuit 29 is connected. As a result, the vehicle control circuit 27 takes in the accessory voltage Vac. Further, a main load voltage detection circuit 30 for detecting a voltage output from the on mode output terminal 192 (hereinafter referred to as an on mode voltage Von) is connected. As a result, the vehicle control circuit 27 also incorporates the on-mode voltage Von. Further, the vehicle control circuit 27 inputs / outputs various data by the input / output signal Sin and the output signal Sout with the power storage device 13.
  • the power storage device 13 has a built-in power storage unit 31 for storing power to be supplied to the accessory load 15 after idling is stopped.
  • the power storage unit 31 is rapidly charged / discharged.
  • the electric double layer capacitor which can be used was used.
  • the power storage unit 31 is charged with power from the main power supply 11, and for this purpose, a charging circuit 33 is connected between the main power supply 11 and the power storage unit 31.
  • the discharge of the electric power of the power storage unit 31 to the accessory load 15 is performed by a discharge switch 35.
  • the accessory load 15 is connected to the voltage Vab directly supplied from the main power supply 11 and the voltage Vaa supplied from the accessory power supply system via diodes 37 and 37 for preventing backflow, respectively.
  • the output of the discharge switch 35 is also divided into two systems, which are connected to the accessory load 15 via the backflow prevention diodes 39 and 39, respectively.
  • the power storage device 13 is connected to a voltage detection circuit 41 for switching and detecting one of the voltages Vaa, Vab and the voltage Vb of the main power supply 11.
  • the voltage detection circuit 41 receives from the control circuit 43 the voltage selection signal SLV for selecting which voltage to detect, the voltage detection circuit 41 detects the voltage corresponding thereto and transmits the voltage signal Vin to the control circuit 43.
  • the control circuit 43 is composed of a microcomputer, and performs communication with the vehicle control circuit 27 and control of the charging circuit 33 and the discharge switch 35 in addition to communication with the voltage detection circuit 41.
  • the charging control of the charging circuit 33 is performed using the control signal Scont, and the on / off control of the discharging switch 35 is performed using the discharging switch signal S.
  • the charging circuit 33 is
  • the driving power of the voltage detection circuit 41 and the control circuit 43 is supplied from the regulator 45.
  • the regulator 45 converts the input voltage into a constant voltage (for example, DC5V) and outputs it, and the power input to the regulator 45 is configured to be supplied from the main power supply 11 or the power storage unit 31. . That is, normally the power of the main power supply 11 is input to the regulator 45 from the on-mode output terminal 192 of the vehicle power supply switch 19 via the backflow prevention diode 47. When the voltage of the main power supply 11 drops after idling stops, the power is stored. The power of unit 31 is input to the regulator 45 via another diode 47. With such a configuration, the voltage detection circuit 41 and the control circuit 43 can continue to operate even when the starter 23 is driven after idling stop.
  • a constant voltage for example, DC5V
  • the operation of the vehicle power supply device during driving of the starter 23 after idling stop is performed.
  • the work is the same as in the prior art. That is, the power storage device 13 continues to monitor the voltage Vb of the main power supply 11 with the voltage detection circuit 41, and the voltage Vb is a threshold value (for example, the lower limit voltage at which the accessory load 15 can be driven 10. When it is detected that the voltage has decreased to 5V) or less, an operation for permitting power supply from the power storage unit 31 to the accessory load 15 is performed.
  • the control circuit 43 has a discharge switch signal S for turning on the discharge switch 35.
  • the discharge switch 35 is turned on, and power is supplied from the power storage unit 31 to the accessory load 15 via the discharge switch 35 and the diode 39.
  • the accessory load 15 can continue to operate even when the starter 23 is driven.
  • the voltage Vb of the main power supply 11 is lowered to, for example, about 6 V, so that the anode side voltage of the diode 37 is also lowered. Therefore, even if the discharge switch 35 is turned on and power is supplied from the power storage unit 31, the diode 37 is turned off, so that no current flows backward from the power storage unit 31 to the main power supply 11.
  • FIGS. 3 to 8 are subroutine processes, and are executed in the case described below.
  • the operation when the vehicle is first activated from the vehicle non-use state will be described below.
  • the driver switches the vehicle power switch 19 from the lock mode to the accessory mode in order to use the vehicle.
  • the accessory mode switch 19a built in the vehicle power switch 19 is turned on, and the accessory power supply system power is supplied from the accessory output terminal 191 to the accessory load 15 via the diode 37 provided in the power storage device 13.
  • Accessory load 15 is activated.
  • the vehicle control circuit 27 outputs the output of the accessory voltage detection circuit 29, that is, the accessory voltage Vac is a predetermined value (in this embodiment, the above threshold value).
  • step Sl It is determined whether or not the vehicle power switch 19 has been switched to the accessory mode. If not switched to accessory mode (No at step S1), return to step S1 again and continue to determine whether to switch to accessory mode [0076]
  • the vehicle control circuit 27 detects that the vehicle is first started from the vehicle non-use state (initial start state). . Thereafter, it is determined whether or not the driver has turned on the vehicle power switch 19 (step S3). This is done by comparing whether the output of the main load voltage detection circuit 30, that is, the on-mode voltage Von is a predetermined value (same as above, set to 10.5 V).
  • step S3 It is determined whether or not has been switched to the on mode. If the vehicle power switch 19 is not in the on mode (No in step S3), the process in step S3 is continued until the on mode is entered. If vehicle power switch 19 is in the on mode (Yes in step S3), switch 18b is turned on and power is supplied from on mode output terminal 192. Therefore, regulator 45 outputs voltage Vcc via diode 47. As a result, power is supplied to the voltage detection circuit 41 and the control circuit 43, so that the power storage device 13 is activated. As a result, the force with which the control circuit 43 starts operation will be described in detail later. When the vehicle power switch 19 is turned on, the vehicle control circuit 27 transmits a signal indicating the initial start state to the control circuit 43 of the power storage device 13 as one signal of the output signal Sout (step S5). .
  • the initial activation operation of the vehicle control circuit 27 related to the power storage device 13 is completed.
  • the control circuit 43 of the power storage device 13 performs the following initial startup operation.
  • control circuit 43 of power storage device 13 in FIG. 4 first, when vehicle power switch 19 is turned on in step S3 in FIG. 2 and vehicle power switch 19 is turned on, power storage device 13 is activated as described above. Then, the operation of the control circuit 43 starts. Thereafter, an initial start signal is transmitted from the vehicle control circuit 27 in S5, and is received as one signal of the input signal Sin of the control circuit 43 (step S31). As a result, the control circuit 43 knows that the vehicle is first activated from the time when the vehicle is not in use, so that the power storage device 13 prohibits the power supply from the power storage unit 31 to the accessory load 15. Turn off (Step S33). In this way, the control circuit 43 ends the initial startup operation.
  • the power storage device 13 When the power storage device 13 operates as described above, the power supply from the power storage unit 31 to the accessory load 15 is prohibited when the vehicle is first activated from the non-use state of the vehicle.
  • switch 19 When switch 19 is set to start mode, the accessory load 15 is turned off.
  • the accessory load 15 does not operate or not depending on the amount of power stored in the power storage unit 31 at the initial startup. Therefore, it is possible to reduce the possibility of a driver's misrecognition to the failure of the power supply system and the accessory load 15, and to obtain a highly reliable vehicle power supply device.
  • the accessory voltage detection circuit 29 may be provided in the power storage device 13. In this case, power is supplied to the power storage device 13 when the vehicle power switch 19 is switched to the on mode. At that time, the control circuit 43 captures the output signal of the accessory voltage detection circuit 29, and the accessory voltage Vac is predetermined. If the value (for example, 10.5V) or more, it is determined that the vehicle is first activated since the vehicle is not in use. Thereby, the discharge switch 35 is controlled. With such a configuration, the function of the accessory voltage detection circuit 29 can be incorporated in the voltage detection circuit 41, so that a simpler configuration can be achieved.
  • the abnormality detection process for the accessory power supply system when the vehicle is used will be described below with reference to FIG.
  • This process may be performed arbitrarily when the vehicle is in use, or may be performed at a time when the power supply source to the accessory load 15 is switched, for example, at the end of idling stop.
  • the processing in FIG. 5 is assumed to be a subroutine processing so as to correspond to either.
  • the accessory voltage detection circuit 29 first detects the accessory voltage Vac and determines whether or not it is in the OFF state.
  • the voltage off state means a state in which there is substantially no voltage. The judgment of the off state is that the accessory voltage Vac is below a predetermined threshold! /, Value (slightly higher than OV! /, Voltage). Judgment by whether or not! The predetermined value is the lower limit voltage that can drive the accessory load 15 (for example, 10. 5V). If the accessory voltage Vac remains off (Yes in step S45), it is determined whether or not a predetermined time has passed (step S47).
  • the predetermined time T1 is set to about 1 second, for example. If the predetermined time T1 has not elapsed (No in step S47), the process returns to step S45 again.
  • an abnormality signal (which means a warning signal such as an alarm) is output to warn the driver of an abnormality in the accessory power supply system and prompt repair (step S49). By this operation, it is possible to accurately warn of an abnormality as a vehicle power supply device, so that high reliability can be obtained.
  • the accessory voltage Vac is not in the off state within the predetermined time T1 (No in step S45)
  • the accessory power supply system is normal and the subroutine processing is terminated.
  • a disconnection detection process for a load when the vehicle is used will be described below with reference to FIG. This operation may be performed arbitrarily when the vehicle is used, or may be performed at a time when the power supply source to the accessory load 15 is switched, for example, at the end of idling stop.
  • the processing in FIG. 6 is assumed to be a subroutine processing so that both can be handled.
  • step S51 it is determined whether or not the voltages Vaa and Vab are off (step S51).
  • the determination of the off state is made based on whether or not the voltages Vaa and Vab are below a predetermined value.
  • the predetermined value is set to 9.8 V which is a lower limit voltage at which the accessory load 15 can operate. Note that the predetermined value in the processing of step S45 in Fig.
  • step S51 is the force set to 10.5V.
  • This is the predetermined value for the accessory voltage Vac, and there is a diode between the accessory voltage Vac and the input voltage Vab to the accessory load 15. 37 was connected, so the voltage drop (0.7V) was subtracted, and the predetermined value in step S51 was set to 9.8V.
  • This predetermined value is the voltage V of the power storage unit 31 even at the input voltage Vaa to the accessory load 15 for the main power source V b.
  • the same input voltage Vaa, Vab to accessory load 15 for c is 9 ⁇ 8 V.
  • step S51 if neither of the input voltages Vaa and Vab to the accessory load 15 is in the OFF state (No in step S51), the input voltages Vaa and Vab to the accessory load 15 are normal. The process ends.
  • step S53 it is determined whether or not a predetermined time T2 has elapsed.
  • the predetermined time T2 was set to 1 second, similar to the predetermined time T1 in step S47 of FIG. If the predetermined time T2 has not elapsed (No in step S53), the process returns to step S51 again, and whether or not the input voltages Vaa and Vab to the accessory load 15 are off until the predetermined time T2 elapses.
  • the predetermined time T2 elapses (Yes in step S53)
  • the input voltages Vaa and Vab supplied to the accessory load 15 are turned off for the predetermined time T2 or more.
  • step S55 the control circuit 43 outputs a disconnection signal to the vehicle control circuit 27 (step S55), and the subroutine processing ends.
  • the vehicle control circuit 27 warns the driver of the disconnection and prompts repair. As a result, high reliability can be obtained as a vehicle power supply device.
  • FIG. 7 Note that the process in Fig. 7 is periodically executed by, for example, an interrupt process because it is not known when the use of the vehicle will be terminated. Accordingly, the processing in FIGS. 7 and 8 will be described as subroutine processing.
  • step S70 an end flag indicating that the use of the vehicle has ended is cleared.
  • the vehicle control circuit 27 determines whether the vehicle power switch 19 has switched from the on mode to the accessory mode or the lock mode based on whether or not the output signal Von from the main load voltage detection circuit 30 has been turned off. (Step S71). If it has not been switched (No in step S71), it means that the vehicle is in use. Then, the subroutine processing ends.
  • step S71 if the operation mode of vehicle power switch 19 is switched from the on mode to the accessory mode or the lock mode (Yes in step S71), an end signal is transmitted to control circuit 43 of power storage device 13 ( Step S73). Thereafter, the end flag is turned on (step S75), and the subroutine processing ends.
  • the end of use of the vehicle can be known by checking the end flag in the main routine of the vehicle control circuit 27.
  • the vehicle use end determination processing of the vehicle control circuit 27 related to the power storage device 13 is completed.
  • the control circuit 43 of the power storage device 13 performs the following operation.
  • step S71 when the vehicle power switch 19 is set to the accessory mode or the lock mode with Yes in step S71, the switch 19b of the on-mode output terminal 192 is turned off, so that the electric power of the power storage unit 31 is supplied to the regulator 45. Is done. Therefore, the power storage device 13 can continue to operate.
  • an end signal is transmitted from the vehicle control circuit 27 in step S73, and is received as one signal of the input signal Sin of the control circuit 43 (step S81 in FIG. 8).
  • the control circuit 43 knows that the vehicle usage state has changed to the vehicle non-use state, so that the discharge switch 35 is set so that the power storage device 13 prohibits the power supply from the power storage unit 31 to the accessory load 15. It is turned off (step S83), and the subroutine processing is terminated.
  • the power storage element used in the power storage unit 31 is configured by an electric double layer capacitor.
  • the present invention is not limited to this, and the power storage element is used by using another power storage element such as an electrochemical capacitor. You can configure it.
  • the control circuit 43 is configured to (a) when the vehicle is not in use, and (b) a starter 23 that starts the vehicle engine from the main power supply 11.
  • the switch 35 may be turned on in synchronization with the ON period of the switch 19a in the period from the time til to the time tl3.
  • control circuit 43 is (a) when the vehicle is not in use and (b) when supplying power from the main power source 11 to the starter 23 for starting the vehicle engine.
  • control is performed so that power supply from the power storage unit 31 to the load 15 is prohibited. Even with this configuration, it is possible to obtain the same effect S as described above.
  • FIG. 10 is a block diagram showing a configuration of the vehicle power supply device including the power storage device 13A according to the second embodiment of the present invention
  • FIG. 11 shows a failure detection process executed by the control circuit 43A of FIG. It is a flowchart.
  • the case where the power storage device is applied to an idling stop vehicle will be described.
  • the power storage device 13 A is connected between the main power supply 11 and the accessory load 15.
  • the main power supply 11 is a battery, and a starter (not shown) that consumes a large current intermittently is connected to the main power supply 11.
  • the accessory load 15 is an accessory device such as audio, navigation, and audio visual navigation.
  • the power storage device 13A has the following configuration. First, a charging circuit 33 and a voltage detection circuit 41 that detects the voltage Vb of the main power supply 11 are connected to the output terminal of the main power supply 11. charging A storage unit 31 is connected to the circuit 33. Therefore, the charging of the power storage unit 31 is controlled by the charging circuit 33 while detecting the voltage Vc of the power storage unit 31.
  • the power storage unit 31 uses an electric double layer capacitor as a power storage element for storing power, and a plurality of these are connected in series to cover the necessary power. Further, a switch 35 for outputting the electric power of the power storage unit 31 to the accessory load 15 is connected as shown in FIG.
  • a diode 121 is connected between a connection point 119 between the voltage detection circuit 41 and the accessory load 15 and one end of the switch 35.
  • the diode 121 has an anode connected to the switch 35 side and a force sword connected to the connection point 119 side.
  • a reverse current prevention diode connected so that the force sword is on the accessory load 15 side is built in the output side of the power system wiring of the voltage detection circuit 41.
  • a voltage detection circuit 125 that detects the voltage V s at the connection point 123 is connected to the connection point 123 between one end of the switch 35 and the diode 121.
  • the voltage detection circuit 125 is configured to output a midpoint voltage when resistance is divided between, for example, two resistors 125a and 125b having the same resistance value between the connection point 123 and the ground.
  • the charging circuit 33, the voltage detection circuit 41, the switch 35, and the voltage detection circuit 125 are also connected to a control circuit 43A composed of a microcomputer.
  • the control circuit 43A takes in the output signal or output voltage of the voltage detection circuit 41 or the voltage detection circuit 125 and simultaneously controls the charging circuit 33 and the switch 35.
  • the control circuit 43A has a function of transmitting / receiving signals to / from a vehicle control circuit (not shown).
  • control circuit 43A transmits a discharge inhibition signal to the vehicle control circuit. This allows the vehicle control circuit to stop idling. Do not perform the action!
  • the diode 121 is turned on, and the power of the power storage unit 31 is preferentially supplied to the accessory load 15. At this time, the power of the power storage unit 31 is not supplied to the main power supply 11 by the backflow prevention diode built in the voltage detection circuit 41.
  • the reliable operation of the switch 35 for controlling the discharge from the power storage unit 31 is important. Therefore, in the power storage device 13A according to the present embodiment, when the predetermined condition is satisfied, that is, “when the power storage device 13A first enters the use state from the non-use state and charges the power storage unit 31” (in this embodiment, the vehicle During the initial start-up), the failure of switch 35 is detected only once until power storage unit 31 is fully charged. Specifically, when the predetermined condition is satisfied, the control circuit 43A first takes in both-end voltages Vc and Vs of the switch 35 with the switch 35 turned off. The voltage Vc is detected by the charging circuit 33, and the voltage Vs is detected by the voltage detection circuit 125.
  • the switch 35 is normally off, the connection point 123 is connected to the ground via the voltage detection circuit 125, so that the voltage Vs becomes OV.
  • the control circuit 43A temporarily turns on the switch 35 (step S101), takes in the voltages Vc and Vs at that time (step S102), and then turns off the switch 35 (step S103).
  • the on-time is set to about 1 second to capture the voltages Vc and Vs at both ends.
  • the power of detecting the failure of switch 35 only once during the initial start-up of the vehicle until the power storage unit 31 is fully charged. This is a failure when the FET switch is used for switch 35. This is because it is sufficient to detect a failure only at the initial start of the vehicle, which is not so frequent. Therefore, when a switch having a contact such as a relay or a reed switch is used for the switch 35, the number of times of failure detection may be increased as appropriate.
  • the failure detection of the switch 35 may be performed after the power storage unit 31 is fully charged, but in this case, since the fully charged power is consumed, it must be fully charged again. In order to avoid such an operation, switch 35 failure detection is performed before the battery is fully charged.
  • the power storage unit 31 repeats charging and discharging. Thereby, especially the diode 121 gradually generates heat. This can cause thermal runaway, especially when the diode 121 is a Schottky type. If this state is left unattended, the operating limit of the diode 121 may be reached and a failure (eg, “short failure”) may occur. .
  • the abnormal heat generation state of the diode 121 is detected. Specifically, first, when the switch 35 is OFF, the control circuit 43A takes in the voltage Vs at the connection point 123. If this voltage Vs becomes equal to or higher than the operation limit value of the diode 121, it is determined that the diode 121 is in an abnormal heat generation state. As described later, since there is a correlation between the heat generation temperature and the voltage Vs, the voltage Vs when the diode 121 reaches a limit temperature that does not greatly affect the failure is obtained in advance and set as the operation limit value. .
  • the reason why the failure of the diode 121 can be determined as described above is as follows.
  • the power sword of the diode 121 is applied with the output voltage (here, Vd) of the power system wiring of the voltage detection circuit 41.
  • Vd the output voltage
  • the diode 121 When the diode 121 generates heat in this state, a leakage current flows from the force sword to the anode.
  • the voltage on the anode side of the diode 121 is the force S that is the voltage Vs of the connection point 123, and the connection point 123 is connected to the ground via the voltage detection circuit 125. Therefore, if the diode 121 is normal, no leakage current flows. Therefore, when the switch 35 is off, the voltage Vs becomes OV. If the leakage current flows due to the force and heat, the voltage Vs becomes higher than OV. Accordingly, by detecting the voltage V s when the switch 35 is off, heat generation can be detected without adding a new circuit.
  • the control circuit 43A detects abnormal heat generation of the diode 121
  • the control circuit 43A stops charging / discharging the power storage unit 31, and transmits a discharge inhibition signal to the vehicle control circuit.
  • the diode 121 Since the current from the power storage unit 31 does not flow, the temperature of the diode 121 decreases.
  • the voltage Vs due to the leakage current also decreases.
  • control is performed so that charging / discharging of the power storage unit 31 is resumed. Send a discharge enable signal.
  • abnormal heat generation of the diode 121 can be prevented, and the reliability of the power storage device 13A can be improved.
  • the operable value of the diode 121 is set to a value smaller than the operation limit value. If both are equal, if the voltage Vs fluctuates due to noise, etc. near the operating limit, charging / discharging of the power storage unit 31 is prohibited and allowed to be repeated in a short time. Because. Therefore, when the voltage Vs rises due to abnormal heat generation of the diode 121 and reaches the operation limit value, and charging / discharging of the power storage unit 31 is prohibited, it goes to the power storage unit 31 until the voltage Vs drops to an operation permission value smaller than the operation limit value. It is configured not to allow charging / discharging.
  • the failure of the switch 35 is detected when a predetermined condition is satisfied, and the failure due to abnormal heat generation of the diode 121 is detected. realizable.
  • the control circuit 43A prohibits charging / discharging of the power storage unit 31 and transmits to the vehicle control circuit that the switch 35 is faulty.
  • the vehicle control circuit prohibits the idling stop operation and warns the driver of the failure of the power storage device 13A and prompts the repair.
  • FIG. 12 is a block diagram showing a configuration of a vehicle power supply device including a power storage device 13B according to the third embodiment of the present invention.
  • the power storage device 13B according to the third embodiment differs from the power storage device 13A according to the second embodiment in FIG. 10 in the following points.
  • a control circuit 43B is provided instead of the control circuit 43A.
  • a fan 129 as a cooling means is provided so that the diode 121 is disposed in the coolable region. The drive power of fan 129 was connected so as to be obtained from the power output of power storage device 13B. Connected to.
  • the operation of the power storage device 13B according to the third embodiment will be described below with reference to FIG. First, the operation at the time of vehicle start-up or idling stop is the same as that of the second embodiment, and thus the description thereof is omitted. Further, since the failure detection operation of the switch 35 performed when the predetermined condition is satisfied and the failure detection operation of the switch 35 and the diode 121 performed when the power storage unit 31 is discharged are the same as those in the first embodiment, description thereof will be omitted.
  • the abnormal heat generation of the diode 121 is detected by determining whether or not the voltage Vs has reached the operation limit value when the switch 35 is off, as in the second embodiment.
  • the second embodiment charging and discharging to the power storage unit 31 is prohibited, and control is performed to naturally cool the diode 121 so that no current flows. Te! /
  • the control circuit 43B turns on the fan switch 131 to operate the fan 129.
  • the diode 121 arranged in the coolable region of the fan 129 is forcibly cooled, so that the voltage Vs drops to the operable value earlier than in the second embodiment.
  • the operation of the diode 121 is the same as in the second embodiment.
  • the possible value is smaller than the operating limit value.
  • the control circuit 43B turns off the fan switch 131 and stops the fan 129. However, the control circuit 43 B does not operate the fan 129 for a predetermined time (the time is estimated in advance from the diode and the surrounding heat capacity and maximum loss, the fan air flow, and the maximum environmental temperature. If it is detected that the voltage Vs does not drop to the operable value and remains unchanged, the diode 121 is cooled and not abnormal, so switch 35 is “short fault”. Judge that you are doing.
  • the force using the fan 129 as the cooling means is not limited to this, and other means such as a Peltier element may be used as the cooling means.
  • the fan 129 has a simpler structure, and not only the diode 121 but also the entire inside of the power storage device 13B can be cooled, so other heat-generating components such as the power storage unit 31 and the charging circuit 33 can be simultaneously used. Can be cooled, and the overall reliability of the power storage device 13B can be improved.
  • FIG. 13 is a block diagram showing a configuration of a vehicle power supply device including a power storage device 13C according to the fourth embodiment of the present invention
  • FIG. 14 shows a failure detection process executed by the control circuit 43C of FIG. It is a flowchart.
  • the power storage device 13C according to the fourth embodiment differs from the power storage device 13A according to the second embodiment in FIG. 10 in the following points.
  • a control circuit 43C is provided in place of the control circuit 43A.
  • a voltage detection circuit 141 for detecting the voltage Vd at the connection point 119 is further provided.
  • the configuration of the voltage detection circuit 141 is the same as that of the voltage detection circuit 125, and its output voltage is input to the control circuit 43C.
  • the operation of the power storage device 13C according to the fourth embodiment will be described below.
  • the operation at the time of starting the vehicle and at the time of idling stop is the same as in the second embodiment, so the description thereof is omitted, and the failure detection of the switch 35 and the diode 121, which is the feature in the operation of this embodiment, will be described below.
  • a failure warning must be issued if at least one of the switch 35 and the diode 121 fails. Therefore, when there is no need to distinguish which one has failed, failure detection is performed as follows.
  • the control circuit 43C takes in the voltage Vc of the power storage unit 31 and the voltage Vd of the connection point 119 from the charging circuit 33 and the voltage detection circuit 141, respectively.
  • the diode 121 has a characteristic that the force sword voltage (here, Vd) is lower than the anode voltage (here, Vs).
  • This voltage drop ⁇ is generally about 0.6 to 0.7 V, but varies depending on the ambient temperature and aging.
  • the allowable range of the voltage drop is the range from ⁇ to ⁇ + ⁇ .
  • the control circuit 43C determines the relationship between the voltages Vc and Vd and the predetermined ⁇ and ⁇ + ⁇ .
  • step S1 11 switch 35 is turned on (step S1 11), and the voltages Vc and Vd at this time are taken in and Vc-Vd> AV + ⁇ is determined (step S113).
  • Vc ⁇ Vd VAV + ⁇ is determined (step S115). If ⁇ — ⁇ Vc -Vd ⁇ ⁇ + ⁇ holds (No in step SI 13 and No in step SI 15) It can be determined that the switch 35 and the diode 121 are “a state including a normal state”.
  • step SI13 if Vc ⁇ Vd> AV + 6 (Yes in step SI13), the difference between voltage Vc and voltage Vd is greater than the allowable range, so either switch 35 or diode 121, one or both are turned on. It will not be. That is, it can be determined that at least one of the switch 35 and the diode 121 is “open failure”. On the other hand, if Vc ⁇ Vd is AV ⁇ (Yes in step S115), the voltage Vc and the voltage Vd are close to each other, so that the diode 121 can be determined to be a “short failure”.
  • the failure detection is performed by the above method, the detection of “open failure” of at least one of the switch 35 and the diode 121 and the “short circuit” of the diode 121 Since it is possible to detect a “failure”, a highly reliable power storage device 13C can be realized.
  • the control circuit 43C prohibits charging / discharging of the power storage unit 31 and transmits to the vehicle control circuit that the switch 35 is faulty. In response to this, the vehicle control circuit prohibits the idling stop operation and warns the driver of the failure of the power storage device 13C and prompts for repair.
  • FIG. 15 is a block diagram showing a configuration of a vehicle power supply device including a power storage device 13D according to the fifth embodiment of the present invention
  • FIG. 16 shows a failure detection process executed by the control circuit 43D of FIG. It is a flowchart.
  • the power storage device 13D according to the fifth embodiment differs from the power storage device 13A of FIG. 10 in the following points.
  • a control circuit 43D is provided instead of the control circuit 43A.
  • a voltage detection circuit 141 for detecting the voltage Vd at the connection point 119 and outputting the result to the control circuit 43D is provided.
  • the control circuit 43D turns on the switch 35 and detects the failure of the switch 35 and the diode 121 while discharging power from the power storage unit 31 to the accessory load 15.
  • the control circuit 43 takes in the voltage Vd at the connection point 119 from the voltage detection circuit 141 in addition to the voltages Vc and Vs described above. At this time, since the voltage Vs is captured, the voltage across the diode 121 is captured.
  • step S121 the difference voltage Vs ⁇ Vd between the anode voltage (Vs) and the force sword voltage (Vd) of the diode 121 must be in the range from ⁇ to ⁇ + ⁇ , as in the fourth embodiment. .
  • the control circuit 43 determines the relationship between the voltages Vs and Vd and ⁇ and ⁇ + ⁇ determined in advance.
  • control circuit 43D detects and takes in the voltages Vs and Vd, whether or not the difference voltage Vs ⁇ Vd> AV + ⁇ (step SI 23), and whether or not the difference voltage Vs + Vd> AV + ⁇ . (Step SI 23).
  • step S127 If ⁇ — ⁇ Vs ⁇ Vd ⁇ AV + ⁇ holds (No in step SI23 and Yes in step S125), it can be determined that diode 121 is normal (step S127). On the other hand, if Vs ⁇ Vd> AV + 6 (Yes in step SI 23), the difference between voltage Vs and voltage Vd is larger than the allowable range, so diode 121 is on and it is determined as an “open failure”. Yes (step S126). If Vs ⁇ Vd ⁇ AV ⁇ (Yes in step S125), the voltage Vs and the voltage Vd are close to each other, so that it can be determined that the diode 121 has a “short failure” (step S 126).
  • the “open failure” of the switch 35 and the failure of the diode 121 can be detected and a failure warning can be given to the driver. This forces the failure of one of switch 35 and diode 121, or both. Since it is possible to distinguish whether the failure has occurred, serviceability at the time of repair is improved. Both failure detections may be performed simultaneously or individually in any order.
  • the switch 35 only “open failure” can be detected for the switch 35. Therefore, by performing the processing of the second embodiment or the third embodiment at the same time, the “short failure” of the switch 35 can also be detected. It can be detected. In this case, failure detection due to abnormal heat generation of the diode 121 can also be performed, so that higher reliability can be obtained, and an optimum configuration can be obtained as the power storage device 13D for the vehicle.
  • the electric double layer capacitor is used as the electric storage element in the electric storage unit 31, but the present invention is not limited to this, and other electric storage elements such as an electrochemical capacitor may be used.
  • the power storage unit 31 has a configuration in which a plurality of power storage elements are connected in series, but the present invention is not limited to this, and may be connected in parallel or in series-parallel depending on the power specifications required by the accessory load 15! /, And you can use a single storage element! /.
  • the present invention is not limited to this, and the hybrid vehicle, the electric power steering, the electric turbo, and the electric hydraulic pressure are described. Applicable to auxiliary power supply for vehicles in each system such as vehicle braking by control or general emergency backup power supply
  • FIG. 17 is a block diagram showing the configuration of the vehicle power supply device including the power storage device 13E according to the sixth embodiment of the present invention
  • FIG. 18 is a diagram showing the operation of the vehicle power supply device of FIG. 4 is a timing chart showing changes in voltages Vb, Vc, Vref and Vmin.
  • Vb, Vc, Vref and Vmin a timing chart showing changes in voltages Vb, Vc, Vref and Vmin.
  • an idling switch 203 is connected to a main power source 11 composed of a battery.
  • the idle switch 203 has an accessory mode, an on mode, and a start mode, and is connected in the same manner as in FIG. 22 of the prior art.
  • the starter 23 is driven when the driver turns on the idle switch 203 to enter the start mode, and the vehicle engine can be started.
  • a power storage device 13E that stores the power of the main power supply 11 is connected to the main power supply 11 and the idle switch 203.
  • An accessory load 15 made of, for example, audio or navigation is connected to the output terminal of the power storage device 13E via a diode 225, which will be described later.
  • the main power supply 11 is connected to the accessory load 15 via the voltage detection circuit 41 that detects the voltage Vb of the main power supply 11, and is also connected to the power storage unit 31 via the charging circuit 33. .
  • the charging circuit 33 has a function of detecting and outputting the voltage Vc of the power storage unit 31.
  • the power storage unit 31 is composed of an electric double layer capacitor, and a plurality of these are connected.
  • One end of a switch 35 is connected to the power storage unit 31.
  • the switch 35 switches whether the power of the power storage unit 31 is supplied to the accessory load 15 or not.
  • An accessory load 15 is connected to the other end of the switch 35 via a diode 225.
  • a control circuit 43E composed of a microcomputer is connected to the voltage detection circuit 41, the charging circuit 33, and the switch 35. Further, the control circuit 43E has a function of performing data communication with a vehicle control circuit (not shown).
  • the power storage terminal 31 is connected to the power supply terminal 218 of the control circuit 43E via the switch 35 and the diode 219, and the main power supply 11 is connected to the power supply terminal 11 via the diode 221 and the decision switch 203, respectively. Used as a power supply source. As a result, power is supplied to the main power supply 11 and the control circuit 43E. Note that the anode of the diode 219 is connected to the switch 35, the power sword is connected to the power supply terminal 18, and the anode of the diode 221 is inactivated so that the power of the main power supply 11 and the power of the power storage unit 31 do not flow backward. The power sword is connected to the power supply terminal 18 and connected to the output of the switch 203.
  • the control circuit 43E controls the switch 35 to switch the power supply source from the main power supply 11 to the power storage unit 31, depending on the response speed of the switch 35, the power supply to the control circuit 43E may be There is a possibility of instantaneous interruption.
  • the capacitor 223 is connected to the power supply terminal 18 in order to prevent the control circuit 43E from being stopped by this.
  • the voltage Vd of the accessory load 15 is higher than the voltage on the power storage device 13E side, the current is reversed from the accessory load 15 to the power storage device 13E. There is a possibility of flowing.
  • a diode 225 and a diode 227 are provided between the switch 35 and the accessory load 15 and between the voltage detection circuit 41 and the accessory load 15, respectively, with the accessory load 15 side connected to the cathode.
  • FIG. 18 an operation when power is supplied from the power storage unit 31 to the accessory load 15 via the switch 35 when the voltage of the main power supply 11 drops will be described.
  • the horizontal axis indicates time, and the vertical axis indicates voltage.
  • reference numeral 501 denotes the power that the power storage unit 31 supplies to the accessory load 15 and the control circuit 43E.
  • time tO the engine is running because the vehicle is in normal condition. Accordingly, since the voltage Vb of the main power supply 11 is higher than the voltage Vc of the power storage unit 31, the power of the main power supply 11 is supplied to the control circuit 43E. Note that these voltages are monitored by appropriately being taken into the control circuit 43E by the voltage detection circuit 41 and the charging circuit 33, respectively.
  • both the power to the control circuit 43E and the 11 power from the main power supply are supplied via the diode 221, so that the power of the power storage unit 31 is not consumed.
  • the voltage Vb of the main power supply 11 starts to drop.
  • the power supply source to the control circuit 43E is also switched to the main power supply 11. Furthermore, since the voltage Vb of the main power supply 11 becomes larger than the voltage Vc of the power storage unit 31 at time t5 when the voltage rises, the power to start charging the power storage unit 31. At this time, the switch 35 remains off. Subsequently, power is supplied from the main power supply 11 to the control circuit 43E. As a result, unnecessary power consumption as in the prior art can be reduced during the period from t4 to t5. That is, the power S reduces the consumption of electric power energy corresponding to the area of the hatched portion 503 in FIG.
  • the power storage unit 31 consumes only the electric energy of the area indicated by the hatched portion 501 in FIG. 18 from time t3 to t4, and hatching in FIG. 23 according to the prior art. It can be seen that the electric energy consumption of the charges corresponding to the areas of the portions 502 and 503 can be reduced.
  • power can be supplied from the power storage unit 31 to the control circuit 43E only during the period in which the switch 35 is on, thereby reducing unnecessary power consumption.
  • the vehicle power supply device can be realized.
  • FIG. 19 is a diagram showing the operation of the modified example of the vehicle power supply device of FIG. 17, and is a timing chart showing changes in the voltages Vb, Vc, Vrefl, Vref2, and Vmin. This is shown in Fig. 19.
  • the modification is characterized in that two reference voltages Vrefl and Vref2 are provided as compared with the operation of FIG.
  • the reference voltage at time t3 was set to Vref2 ( ⁇ Vref l)
  • the reference voltage at time t4 was set to Vref l.
  • control circuit 43E turns on the switch 35 when the voltage Vb of the main power supply 11 is less than the reference voltage Vref2, and turns off the switch 35 when the voltage Vb of the main power supply 11 becomes equal to or higher than the reference voltage Vrefl. . Even in this case, similarly to the present embodiment, it is possible to reduce the power energy consumption of the charges corresponding to the areas of the hatched portions 502 and 503 in FIG. 23 according to the prior art.
  • the power described by using the idling stop vehicle is not limited to this, and can be used for a vehicle system such as an electric power steering or an electric brake.
  • the force S showing a configuration in which a plurality of electric double layer capacitors are connected as the power storage unit 31 the present invention is not limited to this, and other large-capacity capacitors such as electrochemical capacitors are used. May be used.
  • the vehicle power supply device can reduce the possibility of erroneous recognition of a failure by the driver and can obtain high reliability. It is useful as an auxiliary power supply for vehicles that supplies power.
  • the vehicle power supply device suppresses switch failure detection and abnormal heat generation of the diode, and provides high reliability, so that the power storage unit power is supplied particularly when the voltage of the main power supply drops. It is useful as a power supply for vehicles for auxiliary power.
  • the vehicle power supply device can reduce unnecessary power consumption from the power storage unit to the control circuit, so that the vehicle as an auxiliary power supply that supplies power from the power storage unit when the voltage of the main power supply drops. It is useful as a power supply device for an automobile.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

la présente invention concerne un dispositif d'alimentation électrique de véhicule qui comprend : une source d'alimentation électrique principale (11), une charge (15) connectée à la source d'alimentation électrique principale (11), une unité d'accumulation (31) pour accumuler l'électricité de la source d'alimentation électrique principale (11), et un circuit de commande (43) qui fournit de l'électricité à la charge (15) à partir de l'unité d'accumulation (31) lorsque la tension (Vb) de la source d'alimentation électrique principale (11) est réduite jusqu'à une valeur seuil prédéterminée ou moins. Le circuit de commande (43) empêche l'alimentation électrique à partir de l'unité d'accumulation (31) à la charge (15) lorsque le véhicule n'est pas utilisé et lorsque de l'électricité est fournie à partir de la source d'alimentation électrique principale (11) à un démarreur (23) pour démarrer un moteur du véhicule et aucune électricité n'est fournie à partir de la source d'alimentation électrique principale (11) à la charge (15).
PCT/JP2007/070928 2006-11-02 2007-10-26 Dispositif d'alimentation électrique de véhicule WO2008053808A1 (fr)

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EP07830662.8A EP2080673B1 (fr) 2006-11-02 2007-10-26 Dispositif d'alimentation électrique de véhicule

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JP2006-298635 2006-11-02
JP2006298635A JP5130694B2 (ja) 2006-11-02 2006-11-02 車両用電源装置に用いる蓄電装置、及び車両用電源装置
JP2006-315224 2006-11-22
JP2006315224A JP5011978B2 (ja) 2006-11-22 2006-11-22 蓄電装置
JP2006338113A JP5018063B2 (ja) 2006-12-15 2006-12-15 車両用電源装置
JP2006-338113 2006-12-15

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JP2017218111A (ja) * 2016-06-10 2017-12-14 日立オートモティブシステムズ株式会社 車両制御装置
WO2018042765A1 (fr) * 2016-08-30 2018-03-08 三洋電機株式会社 Dispositif de gestion et système d'alimentation électrique
JP2018034629A (ja) * 2016-08-31 2018-03-08 株式会社オートネットワーク技術研究所 蓄電部制御装置
US11411925B2 (en) 2019-12-31 2022-08-09 Oracle International Corporation Methods, systems, and computer readable media for implementing indirect general packet radio service (GPRS) tunneling protocol (GTP) firewall filtering using diameter agent and signal transfer point (STP)
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US11622255B2 (en) 2020-10-21 2023-04-04 Oracle International Corporation Methods, systems, and computer readable media for validating a session management function (SMF) registration request
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US11700510B2 (en) 2021-02-12 2023-07-11 Oracle International Corporation Methods, systems, and computer readable media for short message delivery status report validation
US11751056B2 (en) 2020-08-31 2023-09-05 Oracle International Corporation Methods, systems, and computer readable media for 5G user equipment (UE) historical mobility tracking and security screening using mobility patterns
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US11812271B2 (en) 2020-12-17 2023-11-07 Oracle International Corporation Methods, systems, and computer readable media for mitigating 5G roaming attacks for internet of things (IoT) devices based on expected user equipment (UE) behavior patterns
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US8860244B2 (en) 2008-09-08 2014-10-14 Autonetworks Technologies, Ltd. Vehicle power supply apparatus
US9328711B2 (en) 2011-10-31 2016-05-03 Denso Corporation Control unit for vehicle
JP2017218111A (ja) * 2016-06-10 2017-12-14 日立オートモティブシステムズ株式会社 車両制御装置
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WO2018042765A1 (fr) * 2016-08-30 2018-03-08 三洋電機株式会社 Dispositif de gestion et système d'alimentation électrique
JP7004385B2 (ja) 2016-08-30 2022-01-21 三洋電機株式会社 管理装置、及び電源システム
CN109643906A (zh) * 2016-08-30 2019-04-16 三洋电机株式会社 管理装置和电源系统
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WO2018043482A1 (fr) * 2016-08-31 2018-03-08 株式会社オートネットワーク技術研究所 Dispositif de commande d'unité de stockage d'énergie
CN109643907B (zh) * 2016-08-31 2022-03-15 株式会社自动网络技术研究所 蓄电部控制装置
JP2018034629A (ja) * 2016-08-31 2018-03-08 株式会社オートネットワーク技術研究所 蓄電部制御装置
CN109643907A (zh) * 2016-08-31 2019-04-16 株式会社自动网络技术研究所 蓄电部控制装置
US11411925B2 (en) 2019-12-31 2022-08-09 Oracle International Corporation Methods, systems, and computer readable media for implementing indirect general packet radio service (GPRS) tunneling protocol (GTP) firewall filtering using diameter agent and signal transfer point (STP)
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EP2080673A4 (fr) 2012-11-21
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